Mongoosejs： - 从一个Mongodb集合到另一个Mongodb集合的数据

Question

嗨，我是新手，在节点和mongobd上工作

我使用mongoose在server.js中创建了一个模式：

var userSchema = new mongoose.Schema({
  email: { type: String, unique: true, lowercase: true },
  password: String,
  facebook: String,
  google: String,
  origin: {city: String, state: String},
  destination: {city: String, state: String},
  price: Array,
  time: Date,
  phone_no: String,
  tokens: Array,
  type: String,
  profile: {
    name: { type: String, default: '' },
    gender: { type: String, default: '' },
    location: { type: String, default: '' },
    website: { type: String, default: '' },
    picture: { type: String, default: '' }
  },

  resetPasswordToken: String,
  resetPasswordExpires: Date
});

现在我已经实现了一个用户登录gmail的功能。 一旦他这样做，他就被重定向到主页。

这是在护照的帮助下使用我的收藏品： -

passport.use(new FacebookStrategy(facebook, function(req, accessToken, refreshToken, profile, done) {
  if (req.user) {
    User.findOne({ facebook: profile.id }, function(err, existingUser) {
      if (existingUser) {
        req.flash('errors', { msg: 'There is already a Facebook account that belongs to you. Sign in with that account or delete it, then link it with your current account.' });
        done(err);
      } else {
        User.findById(req.user.id, function(err, user) {
          user.facebook = profile.id;
          user.tokens.push({ kind: 'facebook', accessToken: accessToken });
          user.profile.name = user.profile.name || profile.displayName;
          user.profile.gender = user.profile.gender || profile._json.gender;
          user.profile.picture = user.profile.picture || 'https://graph.facebook.com/' + profile.id + '/picture?type=large';
          user.save(function(err) {
            console.log('Facebook account has been linked.');
            done(err, user);
          });
        });
      }
    });
  } else {
    User.findOne({ facebook: profile.id }, function(err, existingUser) {
      if (existingUser) return done(null, existingUser);
      User.findOne({ email: profile._json.email }, function(err, existingEmailUser) {
        if (existingEmailUser) {
          req.flash('errors', { msg: 'There is already an account using this email address. Sign in to that account and link it with Facebook manually from Account Settings.' });
          done(err);
        } else {
          var user = new User();
          user.email = profile._json.email;
          user.facebook = profile.id;
          user.tokens.push({ kind: 'facebook', accessToken: accessToken });
          user.profile.name = profile.displayName;
          user.profile.gender = profile._json.gender;
          user.profile.picture = 'https://graph.facebook.com/' + profile.id + '/picture?type=large';
          user.profile.location = (profile._json.location) ? profile._json.location.name : '';
          user.save(function(err) {
            done(err, user);
          });
        }
      });
    });
  }
}));

现在，他的凭据将保存在配置文件字段的数据库中。

我希望将他的一些信息放在另一个收藏中..他的用户名等。

是否有可能这样做。请帮帮我。我不知道怎么做mongo